Menopausal Mother Nature

News about Climate Change and our Planet

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Why are the offspring of older mothers less fit to live long and prosper?

(Marine Biological Laboratory) In a new study in rotifers (microscopic invertebrates), scientists tested the evolutionary fitness of older-mother offspring in several real and simulated environments, including laboratory culture, under threat of predation in the wild, or with reduced food supply. They confirmed that this effect of older maternal age, called maternal effect senescence, does reduce evolutionary fitness of the offspring in all environments, primarily through reduced fertility during their peak reproductive period. They also suggest an evolutionary mechanism for why this may occur.

Traffic density, wind and air stratification influence concentrations of air pollutant NO2

(Leibniz Institute for Tropospheric Research (TROPOS)) Traffic density is the most important factor for much the air pollutant nitrogen dioxide (NO2). However, weather also has an influence, according to a study by TROPOS, which evaluated the influence of weather conditions on nitrogen dioxide concentrations in Saxony 2015 to 2018 on behalf of LfULG. It was shown that wind speed and the height of the lowest air layer are the most important factors that determine how much pollutants can accumulate locally.

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Why are plants green?

When sunlight shining on a leaf changes rapidly, plants must protect themselves from the ensuing sudden surges of solar energy. To cope with these changes, photosynthetic organisms have developed numerous tactics. Scientists have been unable, however, to identify the underlying design principle. A physicist has now constructed a model that reproduces a general feature of photosynthetic light harvesting, observed across many photosynthetic organisms.

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Why are plants green?

When sunlight shining on a leaf changes rapidly, plants must protect themselves from the ensuing sudden surges of solar energy. To cope with these changes, photosynthetic organisms have developed numerous tactics. Scientists have been unable, however, to identify the underlying design principle. A physicist has now constructed a model that reproduces a general feature of photosynthetic light harvesting, observed across many photosynthetic organisms.

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Why are plants green?

When sunlight shining on a leaf changes rapidly, plants must protect themselves from the ensuing sudden surges of solar energy. To cope with these changes, photosynthetic organisms have developed numerous tactics. Scientists have been unable, however, to identify the underlying design principle. A physicist has now constructed a model that reproduces a general feature of photosynthetic light harvesting, observed across many photosynthetic organisms.

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Leipzig research balloon becomes platform for Arctic atmosphere measurements in MOSAiC

(Leibniz Institute for Tropospheric Research (TROPOS)) After a preparatory period of about three years, observations that play an important role in studying the atmosphere in the Arctic will start at the end of June: For the first time the regular tethered balloon measurements conducted during the international MOSAiC expedition, are now being enhanced by a balloon that is considerably larger. With a capacity of 90 cubic metres it can be used to measure clouds and atmospheric radiation up to one and a half kilometres above the ice.

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Study evaluates stress level of rehabilitated sea turtles during transport

A new study has found that rehabilitated Kemp’s ridley and loggerhead sea turtles experience a substantial stress response when transported to release locations in the southern United States but that the turtles remained physically stable and ready for release.